CN102714878A

CN102714878A - Method, network device and network system for resources release

Info

Publication number: CN102714878A
Application number: CN2009801182837A
Authority: CN
Inventors: 陈中平; 陈海永
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2009-10-29
Filing date: 2009-10-29
Publication date: 2012-10-03
Anticipated expiration: 2029-10-29
Also published as: WO2011050528A1; CN102714878B

Abstract

The embodiments of the present invention disclose a method, a network device and a network system for resources release. Wherein, the resources release method comprises: determining that the mobility management network element in target side can not establish the SGs association for the user equipment; transmitting the first release message to the network device so that the network device releases the SGs association which is established by the mobility management network element in source side and for the user equipment. The method, network device and network system for resources release disclosed by the embodiments of the present invention can release the invalid SGs association so as to avoid resources waste.

Description

Method, network device and network system for resources release

Method for releasing resource, the network equipment and network system

Technical field

The present invention relates to the communications field, more particularly to a kind of method for releasing resource, the network equipment and network system.Background technology

GPRS（General Packet Radio Service, GPRS)/UMTS（Universal Mobile Telecommunications System, UMTS) it is a kind of architectures of communication networks that 3GPP tissues are defined, the network communication architectures include Radio Access Network（Radio Access Network, RAN) and core network（Core Network, CN) two parts.CN is logically divided into circuit switching i or (Circuit Switched Domain, CS) and packet switch i or (Packet Switched Domain, PS).Wherein CS domains mainly handle speech business, and ps domain mainly handles Packet Service.The signaling plane controlled entity in CS domains is mobile switching centre（Mobile Switch Center, MSC), the signaling plane controlled entity of ps domain is Serving GPRS Support Node（Serving GPRS Support Node, SGSN), SGSN can be connected with MSC by Gs interface.SGSN passes through A interfaces and base station controller（Base Station Controller, BSC) it is connected, pass through Iu interfaces and radio network controller（Radio Network Controller, RNC) it is connected, provide service for GPRS/UMTS data service.The packet network of evolution（Evolved Packet System, EPS) core net mainly include mobile management entity（Mobility Management Entity, MME), gateway（Serving Gateway, SGW), packet data gateway（PDN Gateway, PGW) three logical functional entities, MME therein is responsible for NAS signaling and the function such as NAS signaling encryption and roaming, tracking, distributing user temporary identifications, security function etc., the control plane part for the SGSN that it corresponds to inside current UMTS system.S-GW is responsible for mobility anchor point and Lawful Interception relevant information inside local mobility anchor point and 3GPP system；P-GW is then responsible for strategy execution and charging and Lawful Interception correlation function.The speech business of current operator is operated in GPRS/UMTS circuit domain, in order in EPS nets Existing speech business is reused in network, therefore proposes the MME in the method by EPS network connections to CS domain core nets, EPS networks and is connected to by a SGs interface on the MSC of traditional C/S core net.

Under this architecture, begin to exhale when UE prepares initiation CS（MO, Mobile Originating) business when, UE is needed turning initially to GPRS/UMTS networks, and one 2G/3G of selection cell is stationed, and then carries out MO business again.Exhaled when MSC receives an end（MT, Mobile Terminated) business when, MSC sends beep-page message by SGs interfaces to MME, MME carries out paging by EPS networks to UE, UE is received after the beep-page message, need turning initially to GPRS/UMTS networks, one 2G/3G of selection cell is stationed, and the subsequent treatment of the MT business is then completed again.Therefore, the framework and processing method can turn into the return legacy network processing of CS business（ CS Fallback, CSFB ).Under this architecture, if UE completes combined registering in source MME, source MME sets up SGs for UE with MSC and associated.When UE switches, UE initiates associated update request to target side MME, if target side MME does not support CSFB, so target side MME can not re-establish SGs for UE with MSC and associate, MSC is associated with the SGs that source MME is UE foundation and will not be also released simultaneously, because this SGs associations are invalid associations, so release can cause the waste of resource not in time, and the mechanism for discharging SGs associations is not present in the prior art.The content of the invention

The embodiment of the present invention proposes a kind of method, the network equipment and the network system of resource release, realizes the release to invalid SGs associations.

A kind of method for releasing resource, including：

Determine that target side mobile management network element can not set up SGs associations for user equipment；

The first release message is sent to the network equipment, so that the SGs associations that the network equipment source of release side mobile management network element, which is the user equipment, to be set up.

A kind of method for releasing resource, including：

Receive in the first release message that target side mobility pipe backing wire member is sent, first release message Include configured information；

It is the SGs associations that user equipment is set up according to the configured information source of release side mobile management network element.A kind of method of resource release, including：

Receive the cancel location message that HSS/HLR is sent；

Determine that source mobile management network element establishes SGs associations for user equipment；

Separation is sent to mobile switching centre and indicates message, so that the mobile switching centre discharges the SGs associations that the source mobile management network element is set up for user equipment.

A kind of target side mobile management network element, including：

Determining unit, for determining that target side mobile management network element can not set up SGs associations for user equipment；When equipment sets up SGs associations, the first release message is sent to the network equipment, so that the SGs associations that the network equipment source of release side mobile management network element, which is the user equipment, to be set up.

A kind of network equipment, including：

Receiving unit, configured information is included for receiving in the first release message that target side mobility pipe backing wire member is sent, first release message；

Releasing unit, for being that the SGs that user equipment is set up is associated according to the configured information source of release side mobile management network element received in the receiving unit.

A kind of network system, including target side mobile management network element and the network equipment, wherein

The target side mobile management network element, during for determining that the target side mobile management network element can not set up SGs associations for user equipment, sending to the network equipment and configured information is included in the first release message, first release message；

The network equipment, is that the SGs that user equipment is set up is associated according to the configured information source of release side mobile management network element for receiving the first release message that the target side mobile management network element is sent.

A kind of network system, including：

Home subscriber server/home location register, the mobility pipe for being defined as user equipment service When reason network element changes, send cancel location message and give source mobile management network element；

Source mobile management network element, for receiving the cancel location message that the home subscriber server/home location register is sent, when determining that the source survey mobile management network element has SGs associations for user equipment foundation, separation is sent to mobile switching centre and indicates message, so that the mobile switching centre discharges the SGs associations that the source mobile management network element is set up for user equipment.Brief description of the drawings

Fig. 1 is a kind of the first schematic diagram of method for releasing resource of the embodiment of the present invention；

Fig. 2 A are a kind of the second schematic diagram of method for releasing resource of the embodiment of the present invention；

Fig. 2 B are a kind of the 3rd schematic diagram of method for releasing resource of the embodiment of the present invention；

Fig. 3 is a kind of the 4th schematic diagram of method for releasing resource of the embodiment of the present invention；

Fig. 4 is a kind of the 5th schematic diagram of method for releasing resource of the embodiment of the present invention；

Fig. 5 is a kind of the 6th schematic diagram of method for releasing resource of the embodiment of the present invention；

Fig. 6 is a kind of the 7th schematic diagram of method for releasing resource of the embodiment of the present invention；

Fig. 7 is a kind of schematic diagram of target side mobile management network element of the embodiment of the present invention；

Fig. 8 is a kind of schematic diagram of the network equipment of the embodiment of the present invention；

Fig. 9 is a kind of the first schematic diagram of network system of the embodiment of the present invention；

Figure 10 is a kind of the second schematic diagram of network system of the embodiment of the present invention.Embodiment

Below in conjunction with the accompanying drawings, method, the network equipment and the network system that a kind of resource of the embodiment of the present invention discharges are described in detail.

Referring to the drawings 1, the embodiments of the invention provide a kind of method for releasing resource, including：Set up SGs associations；

Wherein, target side mobile management network element can not set up the reason for SGs is associated for user equipment and include： The target side mobile management network element does not support circuit domain business to return to CSFB;Or the target side mobile management network element supports CSFB, but SGs association failures are set up for the user equipment.

104th, target side mobile management network element sends the first release message to the network equipment, so that the SGs associations that the network equipment source of release side mobile management network element, which is the user equipment, to be set up.

In all embodiments of the invention, the network equipment can be home subscriber server（Home Subscriber Server, HSS)/attaching position register（Home Location Register, HLR), the network equipment can also be source mobile management network element.

Wherein, target side mobile management network element sends the first release message to the network equipment and included：When the updating type that target side mobile management network element obtains the user equipment is associated update, the first release message is sent to the network equipment；Or

When the target side mobile management network element acquisition source mobile management network element establishes SGs associations for the user equipment, the first release message is sent to the network equipment.

Wherein, target side mobile management network element obtains the source mobile management network element and establishes SGs for the user equipment and associate and includes：

Target side mobile management network element receives the message that the source mobile management network element on source mobile management network element sets up SGs associations for the user equipment, and the source mobile management network element is obtained from the message and establishes SGs associations for the user equipment；Or

The source mobile management network element is obtained in the renewal request message that target side mobile management network element is sent from the user equipment and establishes SGs associations for the user equipment, the renewal request message can be joint tracing section updating request message, the renewal of co-location area request message or tracing section updating request message etc..

Configured information is included in the first release message that wherein target side mobile management network element is sent to source mobile management network element, the configured information indicates that the target side mobile management network element can not be used to be described Family equipment sets up SGs associations.

Further, source mobile management network element determines that the target side mobile management network element can not set up SGs associations for the user equipment according to the configured information received, the second release message is sent to mobile switching centre, source of release side mobile management network element is the SGs associations that the user equipment is set up, the state transition that mobile switching centre associates SGs to " SGs is empty " state.

Further, the form of expression of the configured information can include：

" CSFB Supported " cell is included in first release message, the different values of the cell represent whether the target side mobile management network element can set up SGs associations for the user equipment；Or " CSFB Supported " cell is included in first release message, represent that target side mobile management network element can set up SGs associations for user equipment；" CSFB not Supported " cell is included in first release message, represents that target side mobile management network element can not set up SGs associations for user equipment；Or

" CSFB Supported " cell is included in first release message, represents that target side mobile management network element can set up SGs associations for user equipment；Do not include " CSFB Supported " cell in first release message, represent that target side mobile management network element can not set up CGs associations for user equipment.

Wherein, the first release message that target side mobile management network element is sent to HSS/HLR（Location update request message）In include configured information, the configured information indicates that HSS/HLR sends second to mobile switching centre and separates message, HSS/HLR sends the second release message according to the configured information to mobile switching centre, discharges the SGs associations that the source mobile management network element is set up for user equipment.

Further, the form of expression of the configured information can include：It can indicate whether HSS/HLR sends cancel location message to MSC using " ULR Flags " cell in location update request message Update Location Request.For example：If included in " ULR Flags " cell

" MSC-Derigistration-indication " is identified, then indicate that HSS/HLR sends cancel location message to MSC, if ULR Flags " do not include " MSC-Derigistration-indication " marks in cell, do not indicate that HSS/HLR sends cancel location message to MSC etc..

It should be noted that in all embodiments of the invention, mobile management network element can be MME, Can be SGSN etc..

It should be noted that, in all embodiments of the invention, the first release message that target side mobile management network element is sent to source mobile management network element can be separation message, target side mobile management network element to HSS/HLR the first release messages sent can be location update request message etc..Source mobile management network element can be that separation indicates message to MSC the second release messages sent, such as

SGs AP-IMSI-DETACH-INDIC Α Ο Ν message or SGs AP-EPS- DETACH-INDICATION message etc.；HSS/HLR to MSC the second release messages sent can be cancel location message etc..

It it should be noted that HSS and HLR can both merge setting, can also be independently present in network system, merge and be commonly referred to as HSS/HLR when setting, in all embodiments of the invention in order to express easily, be collectively referred to as HSS/HLR.Mobile switching centre and VLR Visitor Location Register（Visitor Location Register, VLR setting can also) be merged, it can also be independently present in network system, the commonly referred to as MSC/VLR when MSC and VLR merges setting, in order to express easily unify that MSC will be called in all embodiments of the invention.

Using method provided in an embodiment of the present invention, when service UE mobile management network element changes, when target side mobile management network element after change can not set up SGs associations for UE, target side mobile management network element can initiate flow of the source of release side mobile management network element for the UE SGs associations set up in time, it is that the SGs that UE is set up associates release by source mobile management network element, because now SGs associations are an invalid associations, so release can avoid the wasting of resources in time.Further, due to the presence of the invalid association, network side can be caused to be mistakenly considered that CSFB business can be carried out, so as to cause MSC to notify source mobile management network element paging UE according to the invalid SGs associations, causes paging failure.

Referring to the drawings 2A, another embodiment of the presently claimed invention provides a kind of method for releasing resource, including：

202nd, the network equipment, which is received, includes configured information in the first release message that target side mobile management network element is sent, first release message；

In embodiments of the present invention, the network equipment can be attaching position register/home subscriber server or source mobile management network element. Wherein, when the network equipment is source mobile management network element, source mobile management network element receives the first release message that target side mobile management network element is sent, configured information is included in first release message, indicates that target side mobile management network element can not set up SGs associations for the user equipment.

When the network equipment is attaching position register/home subscriber server, attaching position register/home subscriber server receives the first release message that target side mobile management network element is sent, first release message can be location update request message, configured information is included in first release message, indicates that attaching position register/home subscriber server sends the second release message to mobile switching centre.

When the configured information indicates that target side mobile management network element can not set up SGs associations for the user equipment, the form of expression of the configured information can include：

Wherein target side mobile management network element can not set up SGs associations for the user equipment and include：Target side mobile management network element does not support circuit domain business to return to CSFB;Or

Target side mobile management network element supports CSFB, but sets up SGs association failures for the user equipment.

When the configured information indicates that attaching position register/home subscriber server sends the second release message to mobile switching centre, the form of expression of the configured information can include：It can indicate whether HSS/HLR sends cancel location message to MSC using " ULR Flags " cell in location update request message Update Location Request.Such as：Included in " ULR Flags " cell During the mark of " MSC-Derigistration-indication ", it indicates that HSS/HLR sends cancel location message to MSC;If do not included in " ULR Flags " cell in location update request message

" MSC-Derigistration-indication " indicates, then does not indicate that HSS/HLR sends cancel location message to MSC.

In all embodiments of the present invention, mobile management network element can be MME, SGSN etc..204th, the network equipment is that the SGs that the user equipment is set up is associated according to the configured information source of release side mobile management network element.

When the network equipment is source mobile management network element, configured information of the source mobile management network element in the first release message received obtains the target side mobile management network element can not set up SGs associations for user equipment, then source mobility pipe network member sends the second release message, the SGs associations that mobility pipe backing wire member in source of release side is set up for the user equipment to mobile switching centre.

When the network equipment is attaching position register/home subscriber server, configured information of the attaching position register/home subscriber server in the first release message received, cancel location message, the SGs associations that mobility pipe backing wire member in source of release side is set up for the user equipment are sent to mobile switching centre.

Wherein, mobile switching centre discharges SGs associations, including：The state transition that mobile switching centre associates SGs is to " SGs empty " state.

The method provided using the embodiment of the present invention, it is that the SGs that user equipment is set up is associated that source mobile management network element or attaching position register/home subscriber server can delete source according to the instruction of target side mobile management network element, avoid due to the wasting of resources caused by the presence that SGs is associated, simultaneously because SGs associations are invalid associations, paging UE failure it also avoid.

Referring to the drawings 2B, another embodiment of the present invention provides a kind of method for releasing resource, including：

S100, source mobile management network element receive the cancel location message that HSS/HLR is sent；Wherein, when being changed for the MME that UE is serviced, HSS sends canceling position to source MME

Canncle Location message.

SGs is associated； S300, source mobile management network element send separation to mobile switching centre and indicate message, so that the mobile switching centre discharges the SGs associations that the source mobile management network element is set up for user equipment.

Mobile switching centre is received after the separation instruction message that source mobile management network element is sent, it is determined that identifying whether for the mobile management network element for identifying with preserving of the source mobile management network element received is consistent, if when inconsistent, discharging the SGs associations that the source mobile management network element is set up for user equipment.

Wherein, mobile switching centre discharges SGs associations, including：The state transition that mobile switching centre associates SGs is to " SGs empty ".

Method provided in an embodiment of the present invention, source mobile management network element can be initiated to discharge the flow of SGs associations, it is to avoid the waste of resource no matter can target side mobile management net element create SGs associations for UE.

It should be noted that, there is also the possibility be combineding with each other for embodiment corresponding to accompanying drawing 1, accompanying drawing 2A and accompanying drawing 2B, it can directly or indirectly be combined together, the SGs associations that source of release side mobile management network element is set up for UE be realized jointly, it is to avoid the waste of resource.

The embodiment of the present invention additionally provides a kind of method of resource release, UE is after source MME completes combined registering, source MME sets up SGs for UE with MSC and associated, when being changed for the MME that UE is serviced, target side MME after change can not set up SGs associations for UE, then target side MME notifies source MME release sources to be the SGs associations that UE is set up, and this method includes：

Referring to the drawings 3, step 301 to step 305 is that UE completes combined registering in source MME, sets up the process of SGs associations, including：

301st, UE sends renewal request message such as tracing section updating request message TAU Request and gives source MME.Wherein the updating type of the tracing section updating request message can be joint tracking area/location area updating request (combined Tracking Area/Location Area Update Request or a combined Tracking Area), can also be single tracking area/single location area updating request or tracing section updating (TA/LAupdating Request).. 302nd, source MME is received after the renewal request message that UE is initiated, if source MME supports CSFB, source MME to send location update request message Location Update Request to MSC, UE Location Area Identification can be included in the message（Location Area Identity, LAI), IMSI International Mobile Subscriber Identity (International Mobile Subscriber Identity, IMSI), source MME address information, location updating type etc..

303rd, MSC execution circuits domain position update flow Location Update in CS Domain.MSC is interacted with HSS, completes circuit domain location updating.

304th, MSC transmissions location updating received message Location Update Accept give can distribute to UE temporarily moved subscriber identification number comprising MSC in source MME, message（Temporary Mobile Subscriber Identify, TMSI) information, the TMSI can be for identifying the UE.

305th, source MME, which is received, updates received message, replys renewal and accepts message to UE.So far, UE completes combined registering in source MME, and source MME is associated with MSC in the SGs that source establishes UE, and UE can perform CSFB business in source network.

Referring to the drawings 4, when UE position area changes, it is changed into target side MME for the UE MME for providing service, when target side MME determines not setting up SGs associations for UE, target side MME can send configured information to source MME, so that source MME initiates the flow of release SGs associations, including：

401st, UE sends tracing section updating request message TAU Request to target side MME, updating type Update Type are included in the tracing section updating request message, wherein the updating type can update request (combined Tracking Area/Location Area Update Request or a combined Tracking Area) to combine blunt track area/location,, can also be single tracking area/single location area updating request or tracing section updating（ TA /LAupdating Request ).

402nd, target side MME sends context request message Context Request to source MME.

403rd, source MME sends context response information Context Response to target side MME

404th, target side MME sends context acknowledgement message Context Ack to source MME. Further, configured information can be included in the context acknowledgement message, the configured information is used to indicate whether UE can set up SGs associations in target side, and wherein the form of expression of the configured information can include：

If including " CSFB Supported " cell in A, context acknowledgement message, it can then indicate whether UE can set up SGs associations in target side according to the different values of cell, value such as cell is 1 expression target side MME support CSFB, and SGs associations can be set up for UE；The value of cell is that 0 expression target side MME does not support CSFB, it is impossible to set up SGs associations for UE, the meaning that the value of cell and different values are stated can be arbitrarily determined；Or

If including " CSFB Supported " cell in B, the context acknowledgement message, then it represents that target side MME supports CSFB, SGs associations can be set up for UE；If including " CSFB not Supported " cell in the context acknowledgement message, then it represents that target side MME does not support CSFB, it is impossible to set up SGs associations etc. for UE；Or

If including " CSFB Supported " cell in C, the context acknowledgement message, then it represents that target side MME supports CSFB, SGs associations can be set up for UE；If not including CSFB Supported " cells in the context acknowledgement message, then it represents that target side MME does not support CSFB, it is impossible to set up SGs associations for UE.

Further, the information whether target side MME supports CSFB can be notified source MME by target side MME in context acknowledgement message each time to the source MME offers configured information;Or

Whether target side MME selectively can be supported CSFB information to notify source MME by target side MME, including：

1st, when the updating type Update Type that UE is sent to target side MME are designated as united tracking area/location area updating request, target side MME sends configured information to source MME, indicates whether target side MME supports CSFB;Or

2nd, when target side MME acquisition sources MME establishes SGs related informations for UE, configured information is sent to source MME, indicates whether target side MME supports CSFB. Wherein target side MME obtains source MME to be included for the UE methods for establishing SGs related informations：

(1) whether, source MME is actively reported to target side MME has been set up SGs associations, for example, source MME is sent to target side MME includes cell instruction target side MME provides the information of SGs associations whether can be set up to source MME in context response information Context Response.Wherein, source MME reported to target side MME whether have been set up SGs association precondition can be source MME for UE establish SGs association, for example, SGs related informations SGs association are set to SGs- ASSOCIATED in source MME;Or

(2), target side MME is by knowing that UE has been set up SGs associations in the UE related contexts that are obtained from source MME, specifically, the related information of SGs associations is set up if included in UE related contexts, for example, MSC information, TIMSI information, SGs related informations（SGs association are set to SGs- ASSOCIATION) etc., then target side MME can confirm that UE has been set up SGs associations；

(3), the acquisition of information UE that target MME is provided according to UE has built up SGs associations, in the tracing section updating request message that such as UE is sent to target MME whether SGs associations have been established comprising source MME for UE, the tracing section updating request message can be united tracking area or the request of united location area updating or individually tracking area or location area updating request.

In this step, it can be that target side MME does not support CSFB that target side MME can not set up the reason for SGs is associated for UE.

Alternatively, 405th, target side MME determines that it can not set up SGs associations for UE, sends separation message and gives source MME, notifies source MME to perform the related procedure of release SGs associations, configured information is included in the separation message, indicates that target side MME can not set up SGs associations for UE.Wherein the form of the configured information and send opportunity of the configured information and be referred to description in step 404.

In this step, target side MME can not set up the reason for SGs is associated for UE to be：Target side MME supports CSFB, but sets up SGs association failures for UE；Or target side does not support CSFB functions. 406th, source MME is received after separation message, according to the configured information included in separation message；Or source MME is received after context acknowledgement message, the configured information based on context included in confirmation message；When knowing that target side MME can not set up SGs associations for UE, source MME sends separation and indicates message to MSC, and the wherein separation indicates that message can be：

If A, the separation indicate that message is SGsAP-IMSI-DETACH-INDICATION message, MSC receives the separation and indicated after message, performs IMSI Datach flows and separates UE from CS domains, source resource is released；Or

If B, the separation indicate that message is SGsAP-EPS- DETACH-INDICATION message, MSC receives the separation and indicated after message, release SGs associations, for example, MSC will " SGs be associated（SGs association) " state transition to " SGs is empty（SGs-NULL) " state.Further, if implicit detach timer is in halted state, implicit detach timer can also be restarted, timer expiry separates UE from CS domains, source resource is released, without any processing if implicit detach timer is in starting state.

407th, MSC sends separation and indicates that confirmation message gives source MME, completes the release of SGs associations.Method provided in an embodiment of the present invention, when target side MME can not set up SGs associations for UE, target side MME notifies source MME release SGs associations, can avoid network resources waste, it it also avoid simultaneously due to there is invalid SGs associations, and cause paging UE to fail.Referring to the drawings 5, another embodiment of the present invention provides a kind of method that resource discharges, UE is after source MME completes combined registering, source MME sets up SGs for UE with MSC and associated, when being changed for the MME that UE is serviced, target side MME after change can not set up SGs associations for UE, then target side MME notifies HSS/HLR release sources to be the SGs associations that UE is set up, and this method includes：

Source MME is that UE sets up the process of SGs associations with reference to step 301 ~ step 305.

When UE position area changes, it is changed into target side MME for the UE MME for providing service, when target side MME determines not setting up SGs associations for UE, configured information is sent to HSS/HLR, Indicate that HSS/HLR initiates to separate the flow of SGs associations, including：

501st, UE sends tracing section updating request message TAU Request to target side MME, updating type Update Type are included wherein in the tracing section updating request message, the updating type can be united 3 Gen Zong areas/united location area updating request (combined Tracking Area/Location Area Update Request), can also be single tracking area/single location area updating request or tracing section updating (TA/LAupdating Request).

502nd, target side MME sends context request message Context Request to source MME;

503rd, source MME sends context response information Context Response to target side MME;

504th, target side MME sends context acknowledgement message Context Ack to source MME;

505th, target side MME send location update request message Update Location Request to

MME mark is included in HSS/HLR, the location update request message（), Identity UE IMSI, updating type Update Type, target side MME ability information etc..Further, if target side MME can not set up SGs associations for UE, configured information is included in the location update request message, indicate that HSS/HLR sends cancel location message to MSC, HSS/HLR sends canceling location information Cancle Location to MSC according to the configured information, and release source MME is the SGs associations that UE is set up.

Further, the form of expression of the configured information can include：It can indicate whether HSS/HLR sends cancel location message to MSC using " ULR Flags " cell in location update request message Update Location Request.Such as：When being identified in " ULR Flags " cell comprising " MSC-Derigistration-indication ", it indicates that HSS/HLR sends cancel location message to MSC;Do not include " MSC-Derigistration-indication " mark in " if ULR Flags " cell, do not indicate that HSS/HLR sends cancel location message to MSC etc..

Further, if target side MME can not set up SGs associations for UE, it can always indicate that HSS/HLR sends cancel location message（Cancle Location) give MSC, or target side MME selectively to indicate that HSS/HLR sends cancel location message（Cancle Location) give MSC.

Wherein, target side MME can selectively indicate that HSS/HLR sends cancel location message (Cancle Location) and included to MSC： Updating type in A, step 501（Update Type) for the request of united tracking area/location area updating when, target side MME sends configured information to HSS/HLR, indicates that HSS/HLR sends Cancle Location to MSC;Or

In B, step 503, target side MME know source MME for UE establish SGs association when, target side MME to HSS/HLR send configured information, indicate HSS/HLR send Cancle Location to MSC.

Wherein, target side MME knows source MME can include for the UE modes for establishing SGs associations：

(1), know that UE has been set up SGs associations in the UE related contexts that target side is obtained from source MME, if specifically, include in UE related contexts and set up the related information of SGs associations, for example, MSC information, TMSI information, SGs related informations（SGs association are set to

SGs-ASSOCIATED) etc., then target side MME can confirm that UE has been set up SGs associations；Or

(2), it is given target side MME by source MME for the UE information active reportings for setting up SGs associations;For example, source MME is sent to target side MME includes cell instruction target side MME provides the information of SGs associations whether can be set up to source MME in context response information Context Response.Wherein, source MME reported to target side MME whether have been set up SGs association precondition can be source MME for UE establish SGs association, for example, SGs related informations SGs association are set to SGs-ASSOCIATED in source MME;Or

(3), source is sent to target side MME by UE for the UE information for setting up SGs associations, in the tracing section updating request message that UE is sent to target MME whether SGs associations have been established comprising source MME for UE, the tracing section updating request message can be united tracking area or the request of united location area updating or individually tracking area or location area updating request.

In embodiments of the present invention, if target side MME can not set up SGs associations for UE, need to indicate that HSS/HLR sends canceling location information Cancle Location to MSC.

Wherein target side MME can not for UE set up the reason for SGs is associated can be target side MME not Support CSFB, or target side MME to support CSFB, but SGs is set up unsuccessfully etc. for UE.506th, HSS/HLR replys location updating confirmation message and gives target side MME.

507th, HSS/HLR sends canceling position cancel Location message to MSC, and MSC receives the message, release SGs associations, for example, MSC is by the state transition of " SGs association " to " SGs-NULL " state；Further, if implicit detach timer is in halted state, implicit detach timer can also be restarted, timer expiry separates UE from CS domains, source resource is released, without any processing if implicit detach timer is in starting state.

Promising UE is preserved in HSS/HLR the information such as the MSC serviced address or mark is provided,

HSS/HLR can address what this was serviced for UE according to information such as the MSC of preservation address or marks

MSC。

508th, MSC replys canceling position confirmation cancel Location ack message to HSS/HLR, so far completes the release of SGs associations.

Method provided in an embodiment of the present invention, when target side MME can not set up SGs associations for UE, target side MME notifies HSS/HLR release SGs associations, can avoid network resources waste, it it also avoid simultaneously due to there is invalid SGs associations, and cause paging UE to fail.

Accompanying drawing 6, the embodiment of the present invention additionally provides a kind of method for releasing resource, including：

It is that UE sets up the process of SGs associations with reference to step step 301 ~ step 305 in source.

601st, UE sends tracing section updating request message TAU Request to target side MME, updating type Update Type are included wherein in the tracing section updating request message, the updating type can be united 3 Gen Zong areas/united location area updating request (combined Tracking Area/Location Area Update Request), can also be single tracking area/single location area updating request or tracing section updating (TA/LAupdating Request).

602nd, target side MME sends context request message Context Request to source MME;

603rd, source MME sends context response information Context Response to target side MME;

604th, target side MME sends context acknowledgement message Context Ack to source MME;

605th, target side MME send location update request message Update Location Request to MME mark can be included in HSS/HLR, the location update request message（Identity, ID) and UE identification informations IMSI etc..

606th, HSS/HLR replys location updating response message and gives target side MME.

607th, HSS/HLR be defined as the UE service MME changed, the MME such as got according to the location update request message in step 605 id information and during the MME ID preserved inconsistent, the MME for being defined as UE services is changed, the MME id informations that HSS/HLR is preserved before being replaced it according to the MME ID information received, i.e., replace source MME id information with target side MME id information.HSS/HLR sends canceling position Cancel Location message to source MME is given, and wherein HSS/HLR can be according to source MME ID addressing sources MME.

608th, source MME replys canceling position confirmation Cancel Location ack message to HSS/HLR.

609th, source MME receives the Cancel Location message that HSS/HLR is sent, if source MME confirms to set up SGs related informations for UE, for example, source MME confirms that " the SGs association " related to UE state is not " SGs-NULL ", then source MME sends separation and indicates that message gives the related MSC of SGs associations described in UE.

Further, source MME sends separation and indicates that message to MSC, in the message can include that MME identification information such as MME name etc. related to SGs associations can also be included in UE identification information such as IMSI, the message.Wherein, the separation indicates that message can be SGsAP-EPS- DETACH-INDICATION message.Wherein release cause can be designated as " MME initiated detach from EPS services ".

610th, MSC receives the separation and indicated after message, the MME identification informations included according to message, discharges the SGs associations that the MME sets up for the UE, and MSC sends separation and indicates that confirmation message gives source MME, completes the release of source SGs associations.

If the MME identification informations are consistent with the MME identification informations that MSC currently preserves for UE, represent that MSC establishes SGs for UE with the MME and associated, MSC is by the state transition of " SGs association " to " SGs-NULL " state, further, if implicit detach timer is in halted state, implicit detach timer can also be restarted, timer expiry separates UE from CS domains, source Side resource is released, without any processing if implicit detach timer is in starting state.If the MME identification informations and the MME identification informations that MSC currently preserves for UE are inconsistent, represent that MSC is associated with the SGs that the MME is UE foundation to be released, for example, now MSC establishes SGs for UE with other MME and associated, MSC will maintain " SGs association " state currently constant, that is, keep existing SGs related contexts constant.

Method provided in an embodiment of the present invention, when the HSS/HLR mobile management network elements for being known as UE services change, cancel location message is sent to source MME, source is surveyed MME and received after the cancel location message, determine that source MME establishes SGs associations for the UE, then initiate to discharge the flow that the SGs is associated, discharge SGs associations, use whether method provided in an embodiment of the present invention can set up SGs associations regardless of target side MME for UE, as long as source MME, which is defined as UE, establishes SGs associations, it can initiate to discharge the flow that the SGs is associated, network resources waste can be avoided, it it also avoid simultaneously due to there is invalid SGs associations, and cause paging UE to fail.Referring to the drawings 7, the embodiments of the invention provide a kind of target side mobile management network element, including：Determining unit 702, for determining that target side mobile management network element can not set up SGs associations for user equipment；When family equipment sets up SGs associations, the first release message is sent to the network equipment, so that the SGs associations that the network equipment source of release side mobile management network element, which is the user equipment, to be set up.

In another embodiment of the presently claimed invention, determining unit 702 determines that target side mobile management network element can not set up SGs associations for user equipment and include：

CSFB;Or family equipment sets up SGs association failures.

In another embodiment of the presently claimed invention, the target side mobile management network element also includes First acquisition unit, the updating type for obtaining the user equipment is associated update；Transmitting element 704, when the updating type for obtaining the user equipment in the first acquisition unit is associated update, the first release message is sent to the network equipment；

Or

Second acquisition unit, is that the user equipment establishes SGs associations for obtaining the source mobile management network element；

Transmitting element 704, for when the second acquisition unit obtains the source mobile management network element and establishes SGs associations for the user equipment, the first release message to be sent to the network equipment.

In another embodiment of the presently claimed invention, the second acquisition unit, the message of SGs associations is set up for the user equipment for receiving the source mobile management network element of source mobile management network element transmission, the source mobile management network element is obtained from the message and establishes SGs associations for the user equipment；Or

The second acquisition unit, for the user equipment person obtained at source mobile management network element

The second acquisition unit, the renewal for being sent from the user equipment obtains the source mobile management network element and establishes SGs associations for the user equipment in asking.

In another embodiment of the presently claimed invention, when including configured information in the first release message that the transmitting element 604 is sent, the configured information indicates that the target side mobile management network element can not set up SGs associations for the user equipment；Or

When including configured information in the first release message that the transmitting element 604 is sent, the configured information indicates that the HSS/HLR sends the second release message to mobile switching centre.

Wherein target side mobile management network element is a kind of appellation of the mobile management network element in different system, can also be called source mobile management network element in an other system.The target side mobile management network element can be MME, SGSN etc.. When SGs is associated, the first release message is sent to the network equipment, source of release side mobile management network element is the SGs associations that user equipment is set up, it is to avoid the waste of resource.

Referring to the drawings 8, the embodiments of the invention provide a kind of network equipment, including：

Receiving unit 802, configured information is included for receiving in the first release message that target side mobility pipe backing wire member is sent, first release message；

Releasing unit 804, for being that the SGs that user equipment is set up is associated according to the configured information source of release side mobile management network element received in the receiving unit 802.

In another embodiment of the presently claimed invention, the network equipment, in addition to：

Determining unit, for when the configured information indicates that target side mobile management network element can not set up SGs associations for the user equipment, determining that target side mobile management network element can not set up SGs associations for the user equipment according to the configured information；State user equipment set up SGs association when, to the mobile switching centre send the second release message, source of release side mobile management network element be user equipment set up SGs association.

In another embodiment of the presently claimed invention, releasing unit 804, for when the configured information indicates that HSS/HLR sends the second release message to mobile switching centre, second release message is sent to the mobile switching centre according to the configured information, source of release side mobile management network element is the SGs associations that user equipment is set up.

The network equipment that the present embodiment is provided can be mobile management network element or HSS/HLR etc., and mobile management network element can be MME, SGSN etc..

The network equipment provided in an embodiment of the present invention can receive the separation message of target side mobile management network element transmission, the SGs associations set up according to the configured information source of release side mobile management network element that includes in separation message for user equipment, it is to avoid the waste of resource.

Referring to the drawings 9, the embodiments of the invention provide a kind of network system, including target side mobile management network element 902 and the network equipment 904, wherein

The target side mobile management network element 902, for determining the target side mobile management network element 902 for user equipment when can not set up SGs associations, send the first release message to the network equipment 904, configured information is included in first release message；

The network equipment 904, is that the SGs that user equipment is set up is associated according to the configured information source of release side mobile management network element for receiving the first release message that the target side mobile management network element 902 is sent.

In another embodiment of the presently claimed invention, when the network equipment 904 is source mobile management network element, the configured information indicates that target side mobile management network element can not set up SGs associations for user equipment；

The source mobile management network element, for determining that target side mobile management network element can not set up SGs associations for user equipment according to the configured information, the second release message is sent to mobile switching centre, the SGs associations that the source mobile management network element is set up for user equipment are discharged.

In another embodiment of the presently claimed invention, when the network equipment 904 is HSS/HLR, the configured information indicates that the HSS/HLR sends the second release message to mobile switching centre；

The HSS/HLR, for sending the second release message to the mobile switching centre according to the configured information, discharges the SGs associations that the source mobile management network element is set up for user equipment.

Network system provided in an embodiment of the present invention, target side mobile management network element is when it is determined that SGs associations can not be set up for user equipment, the first release message is sent to the network equipment, configured information source of release side mobile management network element of the network equipment according to included in the first release message is the SGs associations that user equipment is set up, it is to avoid the waste of resource.

Referring to the drawings 10, the embodiments of the invention provide a kind of network system, including：Home subscriber server/home location register 1002 and source mobile management network element 1004

Home subscriber server/home location register 1002, when being changed for being defined as the mobile management network element of user equipment service, sends cancel location message to source mobile management network element 1004;Source mobile management network element 1004, for receiving the cancel location message that the home subscriber server/home location register 1002 is sent, when determining that the source survey mobile management network element 1004 has SGs associations for user equipment foundation, separation is sent to mobile switching centre and indicates message, so that described move Dynamic switching centre discharges the SGs associations that the source mobile management network element is set up for user equipment.

In another embodiment of the presently claimed invention, the network system can also include：

Mobile switching centre, separation for receiving the transmission of source mobile management network element indicates message, and determine mobile management network element of the expression of the source mobile management network element received with preserving mark it is inconsistent when, discharge the SGs associations that the source mobile management network element is set up for user equipment.

In another embodiment of the presently claimed invention, the mobile switching centre, the state transition for being additionally operable to associate the SGs is " SGs is empty ".

In the network system that the embodiment of the present invention is provided, source mobile management network element is after the cancel location message of home subscriber server/home location register transmission is received, it is defined as user equipment to set up when there are SGs associations, initiate the flow of release SGs associations, no matter can target side mobile management network element set up SGs associations, the SGs associations that source mobile management network element is set up for user equipment can be discharged.

One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can be completed by the related hardware of programmed instruction, and foregoing program can be stored in computer read/write memory medium, and the program upon execution, performs the step of including above method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.Obviously, those skilled in the art can carry out various changes and modification to the present invention without departing from the spirit and scope of the present invention.So, if these modifications and variations of the present invention belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to comprising including these changes and modification.

Claims

Claims

1st, a kind of method for releasing resource, it is characterised in that including：

Determine that target side mobile management network element can not set up SGs associations for user equipment；

The first release message is sent to the network equipment, so that the SGs associations that the network equipment source of release side mobile management network element, which is the user equipment, to be set up.

2nd, method for releasing resource as claimed in claim 1, it is characterised in that determine that target side mobile management network element can not set up SGs associations for user equipment and include：

Determine that the target side mobile management network element does not support circuit domain business to return to CSFB;Or determine that the target side mobile management network element supports CSFB, but set up SGs association failures for the user equipment.

3rd, method for releasing resource as claimed in claim 1, it is characterised in that described to include to the network equipment the first release message of transmission：

When the updating type for obtaining the user equipment is associated update, the first release message is sent to the network equipment；Or

Obtain the source mobile management network element for the user equipment establish SGs association when, to the network equipment send the first release message.

4th, the method for resource release as claimed in claim 3, it is characterised in that the acquisition source mobile management network element establishes SGs associations for the user equipment to be included：The message of SGs associations is set up, the source mobile management network element is obtained from the message and establishes SGs associations for the user equipment；Or

The source mobile management network element is obtained in the context of the user equipment obtained at source mobile management network element and establishes SGs associations for the user equipment；Or

The source mobile management network element, which is obtained, in the renewal request sent from the user equipment establishes SGs associations for the user equipment.

5th, the method for releasing resource as described in Claims 1-4 is any, it is characterised in that when the network is set During for being source mobile management network element, configured information is included in first release message, the configured information indicates that the target side mobile management network element can not set up SGs associations for the user equipment；Or

When the network equipment is home subscriber server HSS/ attaching position register HLR, configured information is included in first release message, the configured information indicates that the HSS/ HLR send the second release message to mobile switching centre.

6th, method for releasing resource as claimed in claim 5, it is characterised in that also include：

When the network equipment is source mobile management network element, the configured information that source mobile management network element ^ is received described in determines that the target side mobile management network element can not set up SGs associations for the user equipment, the second release message is sent to mobile switching centre, source of release side mobile management network element is the SGs associations that the user equipment is set up；

Or

When the network equipment is HSS/ HLR, the HSS/HLR sends the second release message according to the configured information received to mobile switching centre, and source of release side mobile management network element is the SGs associations that the user equipment is set up.

7th, method for releasing resource as claimed in claim 5, it is characterised in that described so that the SGs associations that the network equipment source of release side mobile management network element, which is the user equipment, to be set up include：

So that the network equipment notifies mobile switching centre's source of release side mobile management network element to be the SGs associations that the user equipment is set up, the state transition that the mobile switching centre associates the SGs is " SGs is empty ".

8th, a kind of method for releasing resource, it is characterised in that including：

Receive in the first release message that target side mobility pipe backing wire member is sent, first release message and include configured information；

It is the SGs associations that user equipment is set up according to the configured information source of release side mobile management network element.

9th, method for releasing resource as claimed in claim 8, it is characterised in that described is that the SGs that user equipment is set up is associated according to the configured information source of release side mobile management network element, including：

When the configured information indicates that target side mobile management network element can not set up SGs associations for the user equipment, determine that target side mobile management network element can not be built for the user equipment according to the configured information Vertical SGs associations, the second release message is sent to the mobile switching centre, and source of release side mobile management network element is the SGs associations that user equipment is set up；Or

When the configured information indicates that HSS/HLR sends the second release message to mobile switching centre, second release message is sent to the mobile switching centre according to the configured information, source of release side mobile management network element is the SGs associations that user equipment is set up.

10th, method for releasing resource as claimed in claim 9, it is characterised in that the target side mobile management network element can not set up SGs associations for the user equipment to be included：

The target side mobile management network element does not support circuit domain business to return to CSFB;Or

The target side mobile management network element supports CSFB, but sets up SGs association failures for the user equipment.

11st, the method for releasing resource as described in claim 8 to 10 is any, it is characterised in that described is that the SGs associations that user equipment is set up include according to the configured information source of release side mobile management network element：

Mobile switching centre's source of release side mobile management network element is notified to be the SGs associations that the user equipment is set up according to configured information, the state transition that the mobile switching centre associates the SGs is " SGs is empty ".

12nd, a kind of method for releasing resource, it is characterised in that including：

Receive the cancel location message that HSS/HLR is sent；

Determine that source mobile management network element establishes SGs associations for user equipment；

Separation is sent to mobile switching centre and indicates message, so that the mobile switching centre discharges the SGs associations that the source mobile management network element is set up for user equipment.

13rd, method for releasing resource as claimed in claim 12, it is characterised in that described so that the mobile switching centre discharges the source mobile management network element and included for the SGs associations that user equipment is set up：

So that the mobile switching centre receives the separation and indicated after message, it is determined that when the mark of the source mobile management network element received is consistent with the mobile management network element mark preserved, discharging the SGs associations that the source mobile management network element is set up for user equipment.

14th, the method for releasing resource as described in claim 12 or 13, it is characterised in that described so that the mobile switching centre discharges the source mobile management network element and included for the SGs associations that user equipment is set up： So that the state transition that the mobile switching centre associates the SGs is " SGs is empty ".

15th, a kind of target side mobile management network element, it is characterised in that including：

Determining unit, for determining that target side mobile management network element can not set up SGs associations for user equipment；During for setting up SGs associations, the first release message is sent to the network equipment, so that the SGs that the network equipment source of release side mobile management network element, which is the user equipment, to be set up is associated.

16th, target side mobile management network element as claimed in claim 15, it is characterised in that the target side mobile management network element also includes

First acquisition unit, the updating type for obtaining the user equipment is associated update；

The transmitting element, when the updating type for obtaining the user equipment in the first acquisition unit is associated update, the first release message is sent to the source network device；

Or

Second acquisition unit, is that the user equipment establishes SGs associations for obtaining the source mobile management network element；

The transmitting element, for when the second acquisition unit obtains the source mobile management network element and establishes SGs associations for the user equipment, the first release message to be sent to the network equipment.

17th, target side mobile management network element as claimed in claim 16, it is characterised in that

The second acquisition unit, the message of SGs associations is set up for the user equipment for receiving the source mobile management network element of source mobile management network element transmission, the source mobile management network element is obtained from the message and establishes SGs associations for the user equipment；Or

The second acquisition unit, for the second acquisition unit of the user equipment obtained at source mobile management network element, the renewal for being sent from the user equipment obtains the source mobile management network element and establishes SGs associations for the user equipment in asking.

18th, the target side mobile management network element as described in claim 15 to 17 is any, it is characterised in that configured information is included in the first release message that the transmitting element is sent, the configured information indicates institute SGs associations can not be set up for the user equipment by stating target side mobile management network element；Or

Configured information is included in the first release message that the transmitting element is sent, the configured information indicates that the HSS/HLR sends the second release message to mobile switching centre.

19th, a kind of network equipment, it is characterised in that including：

Receiving unit, configured information is included for receiving in the first release message that target side mobility pipe backing wire member is sent, first release message；

Releasing unit, for being that the S Gs that user equipment is set up are associated according to the configured information source of release side mobile management network element received in the receiving unit.

20th, the network equipment as claimed in claim 19, it is characterised in that also include：

Determining unit, for when the configured information indicates that target side mobile management network element can not set up SGs associations for the user equipment, determining that target side mobile management network element can not set up SGs associations for the user equipment according to the configured information；State user equipment set up SGs association when, to the mobile switching centre send the second release message, source of release side mobile management network element be user equipment set up SGs association.

21st, the network equipment as claimed in claim 19, it is characterised in that

The releasing unit, for when the configured information indicates that HSS/HLR sends the second release message to mobile switching centre, second release message is sent to the mobile switching centre according to the configured information, source of release side mobile management network element is the S G s associations that user equipment is set up.

22nd, a kind of network system, it is characterised in that including target side mobile management network element and the network equipment, wherein

The target side mobile management network element, during for determining that the target side mobile management network element can not set up SGs associations for user equipment, sending to the network equipment and configured information is included in the first release message, first release message；

The network equipment, is that the SGs that user equipment is set up is associated according to the configured information source of release side mobile management network element for receiving the first release message that the target side mobile management network element is sent. 23rd, network system as claimed in claim 22, it is characterised in that when the network equipment is source mobile management network element, the configured information indicates that target side mobile management network element can not set up SGs associations for user equipment；

The source mobile management network element, for determining that target side mobile management network element can not set up SGs associations for user equipment according to the configured information, the second release message is sent to mobile switching centre, the SGs associations that the source mobile management network element is set up for user equipment are discharged.

24th, network system as claimed in claim 22, it is characterized in that, when the network equipment is HSS/HLR, the configured information indicates that the HSS/HLR sends the second release message to HSS/HLR described in mobile switch, for sending the second release message to the mobile switching centre according to the configured information, the SGs associations that the source mobile management network element is set up for user equipment are discharged.

25th, a kind of network system, it is characterised in that including：

Home subscriber server/home location register, when being changed for being defined as the mobile management network element of user equipment service, sends cancel location message and gives source mobile management network element；

Source mobile management network element, for receiving the cancel location message that the home subscriber server/home location register is sent, when determining that the source survey mobile management network element has SGs associations for user equipment foundation, separation is sent to mobile switching centre and indicates message, so that the mobile switching centre discharges the SGs associations that the source mobile management network element is set up for user equipment.

26th, network system as claimed in claim 25, it is characterised in that the network system also includes：Mobile switching centre, separation for receiving the transmission of source mobile management network element indicates message, and when representing consistent with the mark of the mobile management network element of preservation of the source mobile management network element received is determined, discharge the source mobile management network element and associated for the SGs that user equipment is set up.

27th, the network system as described in claim 25 or 26, it is characterised in that

The mobile switching centre, the state transition for being additionally operable to associate the SGs is " SGs is empty ".